High Efficiency Conversion
of Glycerol to 1,3-Propanediol Using a Novel Platinum–Tungsten
Catalyst Supported on SBA-15
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Abstract
The
hydrogenolysis of glycerol to 1,3-propanediol was conducted
over a series of Pt-WO<sub>3</sub>/SBA-15 catalysts with Pt content
ranging from 0.5 to 3 wt % and W content of 10 wt % in vapor phase
under atmospheric pressure for the first time. The catalysts prepared
via sequential impregnation method were systematically characterized
using XRD, NH<sub>3</sub>-TPD, Py-IR, CO chemisorption, TPR, TEM,
and surface area measurements. The catalysts exhibited unprecedented
activity for selective formation of 1,3-propanediol via hydrogenolysis
of glycerol. The effect of various reaction parameters such as catalyst
loading, reaction temperature, hydrogen flow rate, glycerol concentration
and reaction time were studied. The optimized reaction conditions
showed that a high glycerol conversion (86%) and 1,3-propanediol selectivity
(42%) was obtained over 2Pt-10WO<sub>3</sub>/SBA-15 catalyst illustrating
the potential of SBA-15 supported platinum–tungsten catalyst
to be highly active and efficient. The Brønsted acid sites of
the catalyst formed due to addition of WO<sub>3</sub> enhanced selective
formation of 1,3-propanediol